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Finding the Fourth Proportional to 103,405.60, 155,108.40 and 28,537.30

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Solution

The fourth proportional to 103,405.60, 155,108.40 and 28,537.30 is: 42,805.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,405.60 : 155,108.40 = 28,537.30 : x
  2. Step 2: Convert to fraction form
    103,405.60/155,108.40 = 28,537.30/x
  3. Step 3: Cross multiply
    103,405.60x = 155,108.40 × 28,537.30
  4. Step 4: Simplify right side
    103,405.60x = 4,426,374,943.32
  5. Step 5: Solve for x
    x = 4,426,374,943.32/103,405.60
  6. Step 6: Final answer
    x = 42,805.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.